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1. You took a sample of 50 electrical bills in California and found an average of $350 with a standard deviation of $120. Excel What
- 1. You took a sample of 50 electrical bills in California and found an average of $350 with a standard deviation of $120. Excel
- What is the probability that the average bills in California are over $370?
- b. What is the probability that the average bills in California are below $320?
- c. What is the probability that the average bills in California are between $325 and $365? 2. You took a sample of 250 electrical bills in California and 80 of them were over $400. Excel a.
- What is the probability that the percentage of electrical bills in California over $400 is more than 35%.
- b. What is the probability that the percentage of electrical bills in California over $400 is less than 30%. c.
- What is the probability that the percentage of electrical bills in California over $400 is between 30% and 38%
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